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A239171 as a simple table

na(n)
16
212
336
496
5264
6720
71968
85376
914688
1040128
11109632
12299520
13818304
142235648
156107904
1616687104
1745590016
18124554240
19340288512
20929685504
212539948032
226939267072
2318958430208
2451795394560
25141507649536
26386606088192

[6,12,36,96,264,720,1968,5376,14688,40128,109632,
 299520,818304,2235648,6107904,16687104,45590016,
 124554240,340288512,929685504,2539948032,
 6939267072,18958430208,51795394560,141507649536,
 386606088192]